The school of a philosopher is a surgery. You should not depart from it in pleasure, but in pain, for you are not healthy when you come in, but one of you has a dislocated shoulder, another an abscess, another a fistula, another a headache. And am I to come up with pretty thoughts and reflections, so that each of you will go away praising me, but with the same dislocated shoulder, the same aching head, the same fistula, and the same abscess that you brought in?

~ Epictetus